Last year we explained how to turn spare parts from an old DVD drive into a macro lens for your…
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The simplicity of the hack really makes you question its quality, but it surprisingly does improve the macro abilities of the camera. It's obviously not as good as a more involved solution, but if you are having trouble focusing on something with your cheap camera or cellphone camera, taping a glasses lens over the camera lens can work quite well. Here's a picture taken up close without the "macro lens":

And here's one taken with the glasses lens taped over the camera:

It's hard to argue with those results! Just a 50 cent pair of reading glasses and a little Scotch tape go a long way. Hit the link to read more.